Difference:

1. The biggest difference between Linux and UNIX is that the former is free software for developing source code, while the latter is traditional commercial software for protecting source code with intellectual property rights. This should be their biggest difference.

3. This difference is reflected in the fact that users have a high degree of autonomy in the former, but they can only passively adapt to the latter.

4. This difference is also manifested in the fact that the development of the former is in a completely open environment, while the development of the latter is completely in a black box, and only the relevant developers can contact the prototype of the product.

supplement:

1. At present, there are three mainstream Unix systems, namely AIX, HP-UX and Solaris, which run on their own Unix servers. These Unix servers are self-contained, with their own CPU, memory, motherboard and so on.

2. These Unix systems are incompatible with each other. They each have their own system engineers. These engineers are generally only familiar with one of them. If they want to be familiar with other Unix systems, they should continue to learn. These Unix systems are not good or bad, but only different.

3. In addition, Unix servers are used in key application fields of various industries at present. Why? Linux generally runs on PC, which is not stable and parallel enough. It is generally used in small enterprises.

4. Unix systems run on Unix servers. These servers are very stable and have been tested for decades. In addition, the largest number of CPUs in these Unix servers can reach more than 1, and the degree of parallelism is very high, which is unmatched by PCs.

5. At present, Unix servers are in a monopoly position in key applications in telecommunications, finance, oil fields, mobile, securities and other industries. Therefore, only by mastering Unix can we truly enter the high-end industry, which is very important for future career development.